Directive 065: Resources Applications for Oil and Gas Reservoirs ...

Pool Reserves and Deliverability Information
The ERCB updates and publishes pool reserves data annually. For this reason it needs to
understand the operations at the pool. Commercial gas storage pools are also listed in the
annual reserves report, but rather than showing the remaining reserves for these pools, the
storage capacity and maximum deliverability are published.
Requirements
1) An estimate of the initial gas and oil
volumes in place.
Comments
This information will indicate the initial
producible gas reserves.
2) An estimate of the gas and oil recovery
factors.
3) A description of the methods used in
determining the initial gas/oil volumes in
place and the respective recovery factors
(e.g., material balance, volumetric analysis,
model study, and a comparison of analog
pools).
4) The supporting data used in determining the
first two points as outlined above and the
sources of the data (e.g., pressure/volume/
temperature [PVT] properties and source,
pressure data and source).
5) Remaining native gas in place and the
cushion gas required for storage operations.
It is important to determine the remaining
native gas in place before storage commences
and what additional gas needs to be injected
to meet the cushion gas requirements.
6) Working gas volumes. This information will determine the storage
capacity of the pool.
7) Deliverability and injectivity of the reservoir
under the range of operating conditions.
This information will indicate the production
and injection capabilities of the pool.
ERCB Directive 065: Resources Applications / Underground Gas Storage (October 2011) • 4-19